justifier (noun)

1. The justifier in the science fiction novel defended the use of artificial intelligence to solve complex problems.

2. The religious justifier argued that it was essential for people to pray regularly to connect with a higher power.

3. In the romantic comedy, the justifier explained why it was important for the main characters to pursue true love.

4. The justifier in the fantasy book justified the existence of magic as a natural force in the fictional world.